In the advanced options available under Node Configuration, the MapR Installer allows you to restrict MapR to a subset
of network interface cards (NICs) or to specify public IP addresses that can be used with the cluster nodes.

Note: Before enabling security using the Incremental Install function, be sure
to review the known issue (IN-1084) related to custom certificates. See MapR Installer Known
Issues.

You cannot perform the following functions using an
Incremental Install:

Add a node to a cluster

Delete a node from a cluster

Upgrade the MapR Core version

Online Versus Offline Operations

Most Incremental Install
operations are performed online. However, applying a patch or selecting or
deselecting the Enable MapR Secure Cluster option are offline
operations. See Using the Enable MapR Secure Cluster Option. Making a change
to security requires the MapR Installer to stop the Warden and Zookeeper services,
bringing the cluster offline temporarily.

Using Incremental Install

Make the desired changes to add or remove security, add or delete services,
apply a patch, or upgrade the MEP. Then click
Next.

Advance through the MapR Installer screens, providing the admin password or
other information as needed.

After the Incremental Install finishes, if you added
services, use the MCS Services tab or the
maprcli service list -node command to ensure that the
services are running. If the services are not running, you might need to
restart the nodes. For more information, see IN-1332 in MapR Installer Known Issues.